grounding telecommunications cabinet

The safety of passengers depends on the stable operation of communication equipment used by railway workers. Therefore, grounding of telecommunication cabinets on the railway should be as reliable as possible. A request for the calculation of such grounding for one of the railway stations of the Russian Railways came to the ZANDZ Technical Center. A feature of the object is the cramped conditions for the installation of the grounding device. To install it, it is necessary to bypass high-voltage cables and the foundations of fences. Our technical experts offered a solution, which we are sharing with you.


An example of calculating grounding of a telecommunications cabinet for Russian Railways

Object: Telecommunication cabinet.

grounding telecommunications cabinet

Figure 1 - Object placement.



Carry out a grounding device with the resistancenot exceeding 4 ohms.



A set of measures to ensure the necessary requirements for the grounding system of a telecommunication cabinet:

1. Grounding is made in accordance with the EIC 7th ed.

2. Installation of 4 sets of electrolytic grounding ZZ-100-102MB. The ground electrodes are installed with a pitch of at least 6 x 6 m. The sets are combined using a copper-bonded steel tape with the cross section of 30 x 4 mm. The distance from the electrode to the communication lines and foundations must be at least 3 m. The depth is 0.6 m.


Grounding device resistance calculation:

The design resistance of the grounding device is 3.34 ohms.


Figure 2 shows the arrangement of equipment.

Table 1 provides a list of the necessary equipment and materials for grounding the telecommunications cabinet for Russian Railways.

Комплект электролитического заземления – electrolytic grounding kit
Полоса омедненная – copper-bonded tape


Заземление телекоммуникационного шкафа

Figure 2 - Location of equipment for grounding a telecommunications cabinet for Russian Railways.


Chart 1 - List of equipment and materials.

Figure Product item Name Quantity, pcs.
1. ZZ-100-102МВ ZANDZ Electrolytic grounding kit; 3 meters 4
2. ZZ-005-064 ZANDZ Clamp for connecting conductor (up to 40 mm) 6
3. GL-11075-20 1
4. GL-11075-10 GALMAR Copper-bonded tape (30 * 4 mm / S 120 mm²; coil of 10 meters) 1
5. ZZ-007-030 ZANDZ Waterproof tape 2


Do you have questions about grounding on the railway road? Please contact our ZANDZ Technical center!


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